If you are interested in mirror trading / signal following, then you will soon learn about the term "slippage" - basically, this is the difference between the trade entry/exit between signal follower and signal provider. In an ideal world, slippage should be zero, but this is not always realistic given that markets are constantly moving. Slippage is at it's worst as soon as you involve more than one broker - you have a different broker to that of the signal provider. Therefore, it is always best to try and use the same broker. Be careful though of signal providers that claim very low slippage only if you use a brokerage that they OWN and they then "rubbish" the slippage of all other brokers out there - invariably, these signal providers have double-standards and they are only using their signal to rope you into their brokerage, which is perhaps not as good as the one you already have. For our White Swans 99 signal that is available on MQL5.com, we do recommend one particular brokerage, but this is an entirely independent service provider that we have selected based on the huge diversity of trading instruments offered. When selecting your signal provider, always look for honesty and integrity and the moment that you identify a "hidden agenda" you should run a mile.
Slippage - a method of fraud applied by brokers, because they have no interest in you to win money from them. The same Applies to Requote (closing an order an then it closes after couple of seconds to increase loss/decrease profit.)
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